Add Issue+PR Templates

## Description

Create a custom Issue and Pull Request Template.

## Additional Details

- Make an Issue Template. Any new Contributor must be able to specify if it is a new script or enhancement to an older one. It should also be specified which language he is coding it in.

- Make a Pull Request Template. Any new Contributor must be able to specify if he has met all the requirements like Clean Code, proper README and Documentation, Screenshots (If any) attached and more.

You can take inspiration from [here](https://github.com/stevemao/github-issue-templates) and check [this](https://medium.com/better-programming/github-templates-the-smarter-way-to-formalize-pull-requests-among-development-teams-89f8d6a204f) out to know how to achieve the same.